Device and method for demand control of two-way power supply system

Abstract

The invention discloses a device and a method for demand control of a two-way power supply system. A power flow regulator composed of an isolation transformer, a series-side inverter and a parallel-side inverter is connected in parallel to a spare power automatic switching bus tie switch between two power supply buses powered by a two-way power supply. When the sum of real-time demands of the twopaths in the two-way power supply exceeds a total demand limit value, the power flow regulator transfers the energy of one power supply bus to the other power supply bus. Thus, the sum of the total demand of the system, namely, the demand of a user metering point, is reduced, the basic electric charge is reduced, and the electric energy demand of the load can be ensured to be met. Various problemsfaced by other demand controllers in the current market can be solved, for example, the load stability is affected due to the fact that the demand is reduced by reducing the load power. The control difficulty and the equipment maintenance amount are reduced, the service life of the equipment is prolonged, and the economic benefit is very good.

Description

Technical field [0001] The invention relates to the field of power supply and distribution, in particular to a device and method for demand control of a dual-circuit power supply system. Background technique [0002] Electricity fee is one of the main costs of industrial enterprises, especially large industrial users. Reasonable and orderly power load management can strengthen the economic efficiency of enterprise electricity consumption, maintain the economic operation of the enterprise's power supply and distribution network, and improve the economic benefits of the enterprise itself. Conducive to the implementation of enterprise comprehensive resource planning. At present, domestic users of large industrial enterprise users with a power receiving transformer capacity of not less than 315kVA, according to the current electricity price system, are required to implement the industrial electricity price and implement the two-part electricity price. The basic electricity fee can be...

AI Technical Summary

Problems solved by technology

This method often has the following problems in the process of implementing demand control: the method of interrupting the power supply to the load or reducing the load power will often seriously affect the normal production, causing great inconvenience to the production plan execution and scheduling. As a result, this demand control technology is difficult to popularize

[0008] Moreover, this method is not really "shifting peaks and filling valleys", it only realizes "peak cutting", and does not really make use of the "valley point" of demand; in addition, the demand is reduced by controlling the load and reducing the load power , may lead to unstable product quality, ultimately resulting in waste of materials and increased production costs

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